Hydraulic braking system for megawatt fan

Abstract

The invention discloses a hydraulic braking system for a megawatt fan, relates to the technical field of wind power generation and aims to solve the technical problems in the prior art. The system comprises an oil tank, an electric box, a motor pump, a manual pump, two accumulators and a brake module, wherein the motor pump and the manual pump are connected with an oil inlet of the brake module; the motor pump is a main power source and the manual pump is a standby power source; the two accumulators provide auxiliary power for the brake module; and a control oil circuit of the brake module isdivided into three paths, namely a first path starts from the oil inlet of the brake module to a spindle brake control interface of the brake module through a group of valves, and is a spindle brake control oil circuit, a second path starts from a secondary accumulator to a spindle brake control interface of the brake module through a group of valves, and is a spindle brake auxiliary control oil circuit, and a third path starts from the oil inlet of the brake module to a yaw brake control interface of the brake module through a group of valves, and is a yaw brake control oil circuit. The provided system can continuously work during power failure.

Description

technical field [0001] The invention relates to the technology of wind power generation, in particular to the technology of a hydraulic brake system of a megawatt fan. Background technique [0002] The main function of the hydraulic brake system of megawatt wind turbines is to provide power for the yaw brake actuator and the main shaft brake actuator. [0003] The hydraulic braking system of the existing megawatt fan has the following defects: 1) Since the motor pump is used as the power source of the brake actuator, when the system loses power or the motor pump fails, the brake actuator will lose the power source. 2) During the yaw braking process of the wind turbine, the existing system controls the oil supply flow and yaw pressure of the yaw brake to be unstable, so the stability and reliability of the wind turbine yaw brake Poor, uneven force on yaw power components, easy to be damaged due to fatigue impact; 3) The existing system needs to continue to use hydraulic oil ...

AI Technical Summary

Problems solved by technology

[0003] The hydraulic braking system of the existing megawatt fan has the following defects: 1) Since the motor pump is used as the power source of the brake actuator, when the system loses power or the motor pump fails, the brake actuator will lose the power source. 2) During the yaw braking process of the wind turbine, the existing system controls the oil supply flow and yaw pressure of the yaw brake to be unstable, so the stability and reliability of the wind turbine yaw brake Poor, uneven force on yaw power components, easy to be damaged due to fatigue impact; 3) The existing system needs to continue to use hydraulic oil when the fan is uncabled, so the service life of the motor pump is short; 4) The main shaft brake When the actuator needs to brake at high speed, the braking action will be slow due to the insufficient power provided by the motor pump, which will easily damage the fan

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